linux-kernel - [PATCH 5.4 108/453] spi: stm32: fix reference leak in stm32_spi

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Message-Id: <20201228124942.410245956@linuxfoundation.org>
Date:   Mon, 28 Dec 2020 13:45:44 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Zhang Qilong <zhangqilong3@...wei.com>,
        Alain Volmat <alain.volmat@...com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 108/453] spi: stm32: fix reference leak in stm32_spi_resume

From: Zhang Qilong <zhangqilong3@...wei.com>

[ Upstream commit 900ccdcb79bb61471df1566a70b2b39687a628d5 ]

pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to pm_runtime_put_noidle will result in
reference leak in stm32_spi_resume, so we should fix it.

Fixes: db96bf976a4fc ("spi: stm32: fixes suspend/resume management")
Signed-off-by: Zhang Qilong <zhangqilong3@...wei.com>
Reviewed-by: Alain Volmat <alain.volmat@...com>
Link: https://lore.kernel.org/r/20201106015217.140476-1-zhangqilong3@huawei.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/spi/spi-stm32.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 9d8ceb63f7db1..ed20ad2950885 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -2055,6 +2055,7 @@ static int stm32_spi_resume(struct device *dev)
 
 	ret = pm_runtime_get_sync(dev);
 	if (ret < 0) {
+		pm_runtime_put_noidle(dev);
 		dev_err(dev, "Unable to power device:%d\n", ret);
 		return ret;
 	}
-- 
2.27.0